Draw a circle of 1000m radius around users location in MKMapView

Question

(Using iOS 5 and Xcode 4.2)

I have an MKMapView and want to draw a circle of 1000m radius around the user location.

On the surface it would seem tha

Answer 1

It's easy to add a circle. Conform to MKMapViewDelegate. follow the bellow steps,,,

Step 1 :

 CLLocationCoordinate2D center= {self.locationManager.location.coordinate.latitude, self.locationManager.location.coordinate.longitude};
// Add an overlay
MKCircle *circle= [MKCircle circleWithCenterCoordinate:center radius: 20000];//your distance like 20000(like meters)
[myMapView addOverlay:circle];

Step 2 :

 - (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id<MKOverlay>)overlay
 {
    MKCircleView *C_View = [[MKCircleView alloc] initWithOverlay:overlay];
    [C_View setFillColor:[UIColor lightGrayColor]];
    [C_View setStrokeColor:[UIColor blackColor]];
    [C_View setAlpha:0.5f];

    return C_View;
 }

Answer 2

Swift 3/ Xcode 8 here:

func addRadiusCircle(location: CLLocation){
    if let poll = self.selectedPoll {
        self.mapView.delegate = self
        let circle = MKCircle(center: location.coordinate, radius: 10)
        self.mapView.add(circle)
    }
}

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
    if overlay is MKCircle {
        let circle = MKCircleRenderer(overlay: overlay)
        circle.strokeColor = UIColor.red
        circle.fillColor = UIColor(red: 255, green: 0, blue: 0, alpha: 0.1)
        circle.lineWidth = 1
        return circle
    } else {
        return MKPolylineRenderer()
    }
}

Then call like so:

self.addRadiusCircle(location: CLLocation(latitude: YOUR_LAT_HERE, longitude: YOUR_LNG_HERE))